Sign for a vehicle



FIG. 1 is a front elevational view of a sign for a vehicle showing my new design as applied to a vehicle door which is shown in broken lines, the broken lines forming no part of the claimed design;

FIG. 2 is a front elevational view of the sign for a vehicle, the rear view being plain and unornamented;

FIG. 3 is a top plan view thereof; and,

FIG. 4 is a bottom plan view thereof. 

The ornamental design for a sign for a vehicle, as shown and described. 